Dust-collector.



D. J. T. OLDHAM.

DUST COLLECTOR.

APPLIGA'I'ION FILED BEPTJZ, 1908.

960,686} Patented June 7, 1910.

a SHEETS-SHEET 1. i-

I Q In D. J. T. OL DHAM.

DUST COLLECTOR. APPLICATION FILED SEPTJZ, 1908.

Patented June 7,1910.

3 SHEETS-SHEET 2.

jwoewtoa $6M FWa/n IJ any/Q; attowmgy ANDREW B. GRAHAM CO.PHDTO-UTHOGRAPKERS. WASHINGTON. I) c D. J. T. OLDHAM.

DUST COLLECTOR. APPLIOATION FILED SEPT. 12, 1908.

Patented June 7, 1910.

a sums-skimms;

DAVID J". '1. OLDHAM, OF NEW YORK, N. Y.

DUST-COLLECTOR.

oeacse.

Specification of Letters Patent.

Patented June 7, 1910.

Application filed September 12, 1908. Serial No. 452,775.

T all whom it may concern: 1

Be it known that 1, DAVID J. T. OLDHAM, a citizen of the United States,residing in the city of New York, borough of Manhattan, county and Stateof New York, have invented certain new and useful Improvements inDust-Collectors, of which the following is a full, clear, and exactspecification.

This invention relates to dust collectors.

The objects of the invention are to improve the construction and toincrease the efficiency of such devices.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts, and in the details of construction hereinafterdescribed and claimed, it being distinctly understood, however, thatchanges in the pre cise embodiment of invention illustrated anddescribed can be made within the scope of the claims without departingfrom the spirit of the invention.

In the accompanying drawing forming part of this specification, Figure 1is an end elevation of a dust collector constructed in accordance withthe invention. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical,

longitudinal section through the dust collector. Fig. 4 is a section onthe line 4-4 of Fig. 3. Fig. 5 is a view looking upward at the bottom ofthe spraying chamber, showing the narrow, elongated passage between thespraying chamber and the reservoir or tank. Fig. 6 is a detail view ofpart of one of the suction devices or fans. Fig. 7 is a sectional viewon the line 7-7 of Fig. 6. Fig. 8 is a detail sectional view of thebearing for the fan shaft. Fig. 9 is a section on the line 9-9 of Fig.8.

Like reference numerals indicate corresponding parts in the differentfigures of the drawing.

The reference numeral 1 indicates a tank or reservoir having a closedupper end 2. Extending through the upper end 2, as shown best in Fig. 5,is a narrow, elongated passage 3, which communicates with the lowerportion of an approximately tubular spraying chamber 3. The oppositeends of the spraying chamber 3 are open to the atmosphere, and it isintended to suck the dust-laden air in through said ends. A screen 4 isprovided at each end of the spraying chamber 3. Mounted inside thespraying chamber 3, is a pair of circular members 5 and 6 (Figs. 3 and4), which are held together by means of the bolts 7 and spacing members8. Each of the circular members 5 and 6 is provided with a threearmspider or support 9. Extending through each of the spiders 9, as shownin Figs. 8 and 9, is a sectional bushing 10, which is held in positionby means of the bolts 11, provided with lock-nuts 12. Oil is supplied tothe bushing 10 by means of an oil pipe 13, provided with an oil cup 14.Extending through the bushing 10 is a shaft 15, which is provided at oneend with a belt wheel 16, adapted to be operated by means of a belt 17.Mounted rigidly on the shaft is a pair of suction fans and 21. The fans20 and 21 are mounted at the ends of the spraying chamber 3, and act inopposite directions so as to draw air into the chamber 3 from both ends,the blasts of air meeting each other in the center of the sprayingchamber 3 and breaking up. Fixed on the shaft 15 between the fans orsuction devices 20 and 21, is a pair of spraying devices or paddles 25and 26. Leading from the lower portion of the tank 1 is a suction pipe30, which extends upward to a pump 31, operated by means of a belt wheel32. The pump 31 forces water upward through a pipe 33, which is providedwith a valve 34, into a pipe 35, having a plurality of nozzles 36, whichproject through the wall of the spraying chamber 3, and are adapted todischarge jets of water on to the spraying devices 25 and 26. The pipe35 is connected with a feed water pipe 37, having a valve 38. Leadingfrom the pipe 35 is a branch pipe 39, which extends downward into theupper portion of the tank 1, and is provided with a valve 40. When it isdesired to feed the initial supply of water to the tank 1, the valve 34is closed, and the valves 38 and are opened, so that water is fedthrough the supply pipe 37, pipe 35 and pipe 39 to the tank 1. After asufficient quantity of water has been fed to tank 1, valves 38 and 40are closed, valve 34 is opened and pump 31 is operated to cause acirculation of water from the tank 1, up through pipes 30, 33, and 35and nozzles 36, on to the rotary spraying devices 26, which throw thewater in all directions in the spraying chamber 3, thus causing it totake up the dust in the dust-laden air. The water then flows downwardthrough the passage-way 3, into the tank 1. The tank 1, as shown in Fig.1, is provided with an exhaust pipe 45, having a valve 46, which isopened when it is desired to drain the water from the tank 1. A11overflow pipe 47 connects with the upper portion of the tank 1, andleads into pipe 45, outside of the valve 46, so as to preventoverflowing of tank 1. Leading away from the upper portion of thespraying chamber 3, is an exhaust 50 for the air which has been freedfrom dust.

One convenient means of constructing the fans or suction devices 20 and21 is illustrated in Figs. 6 and 7. Each of the blades 55 is providedwith a metal reinforcement 56, which is bolted or otherwise secured at57 to the hub 58, said hub being keyed at 59 to the shaft 15.

The operation of the device is believed to be apparent from theforegoing description. The dust-laden air is sucked in through the endsof the spraying chamber 3 in opposite directions, meets in the center,and is broken up and very effectively sprayed with water by the sprayingdevices or paddles 25 and 26. The dust is carried downward through theopening 3', into the tank 1, and the purified air passes upward throughthe exhaust 50, which may either discharge it into the atmosphere orsubject it to further treatments if desired.

\Vhat is claimed as new is:

1. A dust collector having a tank, a tubular open-ended spraying chamberabove said tank, an elongated narrow passage connecting the lower end ofsaid spraying chamber with the upper end of said tank, a shaft extendinglongitudinally through the spraying chamber, oppositely-acting suctiondevices mounted on said shaft at the ends of said spraying chamber,spraying paddles mounted on said shaft between said suction devices,means for drawing liquid from said tank and discharging it on to saidspraying paddles, and an exhaust pipe leading from the upper portion ofsaid spraying chamber. 2. A dust collector comprising a tank having anoverflow pipe and an exhaust pipe, an open-ended spraying chamberlocated above said tank, a passage connecting the upper portion of saidtank with the lower portion of said spraying chamber, a shaft extendinglongitudinally of the spraying chamber, oppositely-acting suction fanson the ends of said shaft, spraying paddles mounted on said shaftbetween said suction fans, means for drawing water from said tank anddischarging it on tosaid paddles, means for supplying water to saidtank, and an exhaust pipe communicating with the upper portion of saidspraying chamber.

3. i dust collector comprising a spraying chamber, rotary suctiondevices at the ends of said chamber, rotary spraying devices suctiondevices, operating means for said spraying and suction devices, and awater inlet above said spraying devices, whereby the water is sprayed inthe spraying chamber in the presence of the dust-laden air.

4-. A dust collector comprising a spraying chamber, rotary suctiondevices at the ends of said chamber, rotary spraying devices within saidchamber and intermediate said suction devices, a driving shaft carryingsaid sp'aying and suction devices, and a water inlet above said sprayingdevices, whereby the water is sprayed in the spraying chamber in thepresence of the dust-laden air.

5. A dust collector comprising an elongated spraying chamber, a drivingshaft extending through said spraying chamber, oppositely-acting suctiondevices mounted on said shaft, a spraying device mounted on the sameshaft intermediate said suction devices, a water inlet to said sprayingchamber located above said spraying device, whereby the water is sprayedin said spraying chamher in the presence of the dust-laden air.

6. A dust collector having a spraying chamber, a suction device forsupplying dust-laden air thereto, moving spraying devices in saidchamber, a water inlet to said chamber located above said sprayingdevices, whereby the water is sprayed in said chamher in the presence ofthe dust-laden air, a tank, a conduit between said spraying chamber andtank, circulating pipes connecting said tank and inlet, and means formaintaining a circulation in said pipes,

7. A dust collector comprising a spraying chamber, a tank beneath same,an opening between said chamber and tank, pipes connecting said tankwith the upper part of said chamber, a pump operatively connected withsaid pipes, suction devices at the ends of said spraying chamber,spraying devices located intermediate said suction devices and beneaththe water inlet pipes.

8. A dust collector having a tank, a spraying chamber located above saidtank, means for supplying dust-laden air to said spraying chamber, arotary spraying device in said chamber, means for continuously drawingliquid from said tank and delivering it to said spraying devices inposition to be sprayed in said spraying chamber in the presence of thedust-laden air, and a passageway for returning it to the tank.

9. In a dust collector, a spraying chamber, a driving shaft extendingthrough same, oppositely-acting suction fans disposed at the ends ofsaid chamber upon said shaft, screens guarding the inlet to said fans, aplurality of revolving paddles upon said shaft intermediate said fans,water inlet pipes above said paddles, and a frame for supporting saidshaft secured within said chamber.

10. A dust collector having a spraying within said chamber andintermediate said 1 chamber, a suction device for supplying dust-ladenair thereto, moving spraying devices in said chamber, a water inlet tosaid chamber located above said spraying devices, whereby the water issprayed in said chamber in the presence of the dust-laden air, a tank, aconduit between said spraying chamber and tank, circulating pipesc0nnecting said tank and inlet, means for maintaining a circulation insaid pipes, a feed pipe connected to said circulating pipes, and also tosaid spraying devices, and regulating valves in said feed pipes andcirculating pipes.

11. A dust collector comprising a spraying chamber, a tank beneath same,an opening between said receptacles, pipes connecting said tank with theupper part of said chamber, a pump 0 eratively connected with saidpipes, suction evices at the ends of said spraying chamber, sprayingdevices located intermediate said suction devices and beneath the waterinlet pipes, a feed water supply connected with said pipes, regulatingvalves in said pipes and feed water supply, and overflow and exhaustpipes connected to said tank.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

DAVID J. T. OLDHAM.

Witnesses:

HENRIETTA E. WoRKMAN, CLAUDE C. NEVILLE.

